package com.alan.springBoot.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyInterceptor implements HandlerInterceptor {

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object object, Exception arg3) throws Exception {
		 //System.out.println(">>>MyInterceptor1>>>>>>>在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）");
		
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object object, ModelAndView modelAndView) throws Exception {
		/*System.out.println(">>>MyInterceptor1>>>>>>>请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）");
		System.out.println( JSON.toJSON( object ) );
		System.out.println( JSON.toJSON( modelAndView.getModelMap() ) );
		System.err.println( request.getRequestURI() );*/
	}

	@Override
	public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {
		//System.out.println(">>>MyInterceptor1>>>>>>>在请求处理之前进行调用（Controller方法调用之前）");

        return true;// 只有返回true才会继续向下执行，返回false取消当前请求
	}

}
